A solution turns red litmus blue. On adding acid, heat is released and a salt is formed. What type of reaction is this?
Answer and explanation
Correct answer: Neutralisation reaction
The red-litmus-to-blue change shows that the solution is basic. When an acid reacts with a base, the characteristic products are salt and water; heat is often released because the reaction is exothermic. This is therefore a neutralisation reaction, so option A is correct. Decomposition involves one compound breaking down, displacement involves replacement by another element, and precipitation specifically produces an insoluble solid.
Frequently asked questions
What is the correct answer to this question?
Neutralisation reaction
Why is this the correct answer?
The red-litmus-to-blue change shows that the solution is basic. When an acid reacts with a base, the characteristic products are salt and water; heat is often released because the reaction is exothermic. This is therefore a neutralisation reaction, so option A is correct. Decomposition involves one compound breaking down, displacement involves replacement by another element, and precipitation specifically produces an insoluble solid.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
